1 Explain the purpose of concatenation in a VHDL signal assi

(1) Explain the purpose of concatenation in a VHDL signal assignment.                    

(2) A 4-bit binary up/down counter is set to zero. If the DOWN mode is selected and a five clock pulse is applied, the counter value will be

(3) Show the count sequence for a binary decade up-counter with an initial state of 0000.       

Solution

(1)

The concatenation operator (&) is allowed on the right side of the signal assignment operator \'<=\', only and it is helpful to combine. it is not possible to concatenate the integers direactly but after conversion of integer to conv_std_logic_vector () can concatenate the integers also